I'm affected too. As znorrt in post #5, dual boot ubuntu 12.04 / windows seven with efi/gpt. Solved using boot-repair.
Details here (in French): http://forum.ubuntu-fr.org/viewtopic.php?pid=10705531#p10705531 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1024383 Title: invalid Windows7 EFI entries in GRUB To manage notifications about this bug go to: https://bugs.launchpad.net/os-prober/+bug/1024383/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs